Drug treatment of limb frostbite injuries is complicated due to the poor delivery of medications to affected tissues. External rewarming of the frostbitten area is risky and does not always result in positive outcomes because the dilatation of superficial vessels with constricted deep vessels can lead to irreversible damage, necrosis, and amputation. One of the techniques to restore perfusion of deep vessels in an affected extremity is rewarming with low-power microwave radiation in a specially designed metal chamber. Below are findings following treatment of 14 volunteers with this technique in 2 Tomsk hospitals during winters of 2018–2021. It is demonstrated that timely, i.e. in the early reactive period, application of microwave radiation and appropriate supportive drug treatment results in positive amputation-free outcomes. The key requirement is prompt thermal insulation of the trauma and no prior exposure to external heat sources.
In the article, the results of a study of the temperature distribution inside a phantom in the form of a human foot with a two-layer filling, simulating muscle and bone tissue are shown.Imitation of muscle tissue by dispersed pig meat (minced meat) and the bone by a wax cylinder was carried out.The temperature distribution profiles along the phantom during microwave heating with a power of 40 W in the time interval from 10 to 40 minutes are presented.
The paper presents results of temperature distribution in the phantom of limb under the microwave radiation. The authors have developed automated apparatus based on linear positioner and temperature detector. The apparatus is aimed at measuring the distribution of thermal field in phantom of a human hand. It was shown that impulse microwave radiation with a power of 40W during 6 minutes leads to uniform heating along longitudinal axis of phantom. The apparatus “SMVi-200” was used as a microwave source being normally applied for hypothermia treatment.
The aim of the conducted studies was a comprehensive assessment of the clinical and physiological state of laying hens, which included a fish feed additive (DCR) in the main diet. The composition of the new Prinarovskaya DKR includes chilled river fish, its processed products and grain products (wheat bran). The additive preparation process goes through several stages: grinding, cavitation heating and subsequent drying of the resulting mixture. The investigated additive is a homogeneous dry mass and contains a number of amino acids, vitamins and minerals in its composition. DKR "Prinarovskaya" was fed to laying hens of the Lohmann Lsn-Classic breed of 130 days of age. All chickens participating in the experiment were divided into 4 groups. Chickens of the 1st experimental group included 8 g of "Prinarovskaya" additives per 100 g of the main diet; chickens of the 2nd experimental group - 6 g of additives to OR; chickens of the 3rd experimental group – 4 g of additives to OR; 4-control group of chickens were fed only OR – compound feed PK1-1G-1227, prepared in accordance with GOST R 51851-2001. The usefulness of poultry feeding is reflected in the morphological and biochemical parameters of blood, which served as the basis for using them in an experiment to characterize metabolic processes and assess the state of the body of laying hens. An important indicator of the effect of the new feed additive "Prinarovskaya" on metabolic processes was the determination of the concentration of total protein and the main protein fractions (albumins, globulins). The state of lipid metabolism in terms of cholesterol and triglycerides was analyzed. Indicators of carbohydrate metabolism and the functional state of the liver were also studied. To characterize the mineral metabolism, the level of calcium and phosphorus in the blood serum was determined. The conducted study with a comprehensive assessment of morphological and biochemical parameters of blood confirmed the expediency of including Prinarovskaya DCR in the diet of laying hens, which generally has a positive effect on the state of their body.
The present work presents the results of phantom of human hand simulation with the dielectric properties, very similar with human tissues properties. The simulation was conducted with using “CST Studio” software. The phantom was made by a “papier-mâché” method. The thermal field distribution was measured twice: for the simulation of phantom in “CST Studio” software, and for the phantom filled with dispersed meat of pork, the power was 2.45 GHz. The heating profile of certain points on phantom, including fingers, has been studied. It is shown that the heating profile of fingers zone is different from heating profile of wrist and forearm. The obtained experimental data have shown the possibility of using microwave radiation for deep cold injuries treatment.
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